Novel Thiourea Ligands-Synthesis, Characterization and Preliminary Study on Their Coordination Abilities.

Two series of polydentate ,,-ligands containing thiourea fragments attached to a -cresol scaffold, unsymmetrical mono-acylated bis-amines and symmetrical bis-thioureas, are obtained by common experiments. It is observed that the reaction output is strongly dependent on both bis-amine and thiocarbamic chloride substituents. The products are characterized by 1D and 2D NMR spectra in solution and by single crystal XRD.

Polydentate ,-Ligands Possessing Unsymmetrical Urea Fragments Attached to a -Cresol Scaffold.

In this study, three series of polydentate ,-ligands possessing unsymmetrical urea fragments attached to a -cresol scaffold are obtained, namely mono- and bi-substituted open-chain aromatics, synthesised using a common experiment, as well as fused aryloxazinones. Separate protocols for the preparation of each series are developed. It is found that in the case of open-chain compounds, the reaction output is strongly dependent on both bis-amine and carbamoyl chloride substituents, while oxazinones can be effectively obtained via a common protocol.